Apple Crisp 101

My Mother-in-Law's DELICIOUS Apple Crisp:
5 cups sliced, peeled apples
1/3 cup sugar
1/2 tsp. cinnamon
2 Tbsp. melted butter

Layer in 8 inch square pan.

Topping:
1/2 cup flour
1/2 cup quick oats
1/2 cup brown sugar
1/8 tsp. each soda, baking powder and salt
1/4 cup soft butter

Mix and sprinkle over apples. Bake at 350 for 45 minutes.